:root{
  --paper:#F3EFE7;
  --paper-2:#EDE7DB;
  --ink:#15140F;
  --ink-soft:#4E4A41;
  --muted:#6E6A60;
  --line:rgba(21,20,15,.13);
  --line-soft:rgba(21,20,15,.07);
  --accent:#C8452A;
  --accent-ink:#A8331F;
  --accent-soft:#E2683F;
  --serif:"Songti SC","STSong","Source Han Serif SC","Noto Serif SC",Georgia,serif;
  --sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",Helvetica,Arial,sans-serif;
  --mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,monospace;
}
*{box-sizing:border-box}
html{background:var(--paper)}
body{
  margin:0;min-height:100vh;background:var(--paper);color:var(--ink);
  font:15px/1.6 var(--sans);-webkit-font-smoothing:antialiased;overflow-x:hidden;
}

/* ---------- atmosphere ---------- */
.paper{position:fixed;inset:0;pointer-events:none;z-index:0;overflow:hidden}
.paper::before{ /* warm light */
  content:"";position:absolute;inset:-20%;
  background:
    radial-gradient(58vw 52vw at 14% 8%, rgba(255,246,231,.95), transparent 62%),
    radial-gradient(46vw 46vw at 92% 86%, rgba(232,224,208,.8), transparent 60%);
}
.paper::after{ /* hairline grid */
  content:"";position:absolute;inset:0;opacity:.55;
  background-image:
    linear-gradient(to right,var(--line-soft) 1px,transparent 1px),
    linear-gradient(to bottom,var(--line-soft) 1px,transparent 1px);
  background-size:96px 96px;
  mask-image:radial-gradient(120vw 100vh at 30% 20%,#000 30%,transparent 78%);
  -webkit-mask-image:radial-gradient(120vw 100vh at 30% 20%,#000 30%,transparent 78%);
}
.grain{
  position:absolute;inset:0;opacity:.055;mix-blend-mode:multiply;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ---------- frame ---------- */
.frame{
  position:relative;z-index:1;min-height:100vh;display:flex;flex-direction:column;
  padding:clamp(18px,2.6vw,34px) clamp(18px,4.2vw,64px) 0;
}
.top{display:flex;align-items:center;justify-content:space-between;gap:24px;padding-bottom:16px;border-bottom:1px solid var(--line)}
.brand{display:inline-flex;align-items:center;gap:11px;color:inherit;text-decoration:none}
.mark{width:28px;height:28px;flex:0 0 28px;color:var(--ink)}
.word{display:flex;flex-direction:column;line-height:1.05;font-weight:600;letter-spacing:.02em;font-size:15px}
.word em{font-style:normal;font-family:var(--mono);font-size:8.5px;letter-spacing:.28em;color:var(--muted);margin-top:4px}
.topmeta{display:flex;align-items:center;gap:12px;font-family:var(--mono);font-size:9.5px;letter-spacing:.16em;color:var(--muted);text-transform:uppercase}
.topmeta i{width:4px;height:4px;border-radius:50%;background:var(--accent);display:block}

/* ---------- layout ---------- */
.grid{
  flex:1;display:grid;grid-template-columns:minmax(0,1.18fr) minmax(340px,.72fr);
  gap:clamp(32px,4.4vw,84px);align-items:start;padding:clamp(22px,4.2vh,48px) 0 clamp(10px,1.8vh,18px);
}
.intro{position:relative;max-width:760px;min-width:0;display:flex;flex-direction:column;align-self:stretch;padding-bottom:2px}
.eyebrow{
  display:flex;align-items:center;gap:12px;margin:0 0 clamp(14px,2.4vh,26px);
  font-family:var(--mono);font-size:10px;letter-spacing:.2em;color:var(--muted);text-transform:uppercase;
}
.rule{width:42px;height:1px;background:var(--accent);display:block}

.display{
  margin:0;font-family:var(--serif);font-weight:600;
  font-size:clamp(40px,5.6vw,96px);line-height:1.04;letter-spacing:-.015em;
  color:var(--ink);
}
.line{display:block;overflow:hidden;padding-bottom:.04em}
.line>span{display:block;transform:translateY(112%);animation:rise 1.15s cubic-bezier(.16,1,.3,1) forwards}
.line:nth-child(2)>span{animation-delay:.12s}

.lede{
  margin:clamp(16px,2.6vh,30px) 0 0;max-width:33em;color:var(--ink-soft);
  font-size:clamp(13.5px,1.05vw,15.5px);line-height:1.95;
  opacity:0;animation:fadeUp .9s .5s cubic-bezier(.16,1,.3,1) forwards;
}

/* specimen */
.specimen{margin:0;margin-top:auto;width:min(500px,86%);padding-top:clamp(16px,2.6vh,30px);opacity:0;animation:fadeUp 1.1s .62s cubic-bezier(.16,1,.3,1) forwards}
.figwrap{position:relative;transform:translateZ(0);will-change:transform;padding:14px 12px}
.figwrap::after{content:"";position:absolute;left:6%;right:6%;bottom:0;height:14%;background:radial-gradient(ellipse at center,rgba(36,26,12,.28),rgba(36,26,12,0) 70%);filter:blur(10px);z-index:-1}
.tick{position:absolute;width:14px;height:14px;border-color:rgba(21,20,15,.35);border-style:solid;border-width:0}
.t1{left:0;top:0;border-left-width:1px;border-top-width:1px}
.t2{right:0;top:0;border-right-width:1px;border-top-width:1px}
.t3{left:0;bottom:0;border-left-width:1px;border-bottom-width:1px}
.t4{right:0;bottom:0;border-right-width:1px;border-bottom-width:1px}
.figwrap img{
  display:block;width:100%;height:auto;transition:transform .8s cubic-bezier(.16,1,.3,1);
  filter:brightness(.985) contrast(1.06) saturate(1.02) drop-shadow(0 38px 30px rgba(38,28,14,.26));
  animation:float 9s ease-in-out infinite alternate;
}
.figcaption{
  display:flex;flex-wrap:wrap;gap:6px 16px;align-items:baseline;
  margin-top:12px;padding-top:10px;border-top:1px solid var(--line);
  font-family:var(--mono);font-size:9.5px;letter-spacing:.1em;color:var(--muted);text-transform:uppercase;
}
.figcaption .fig{color:var(--accent-ink)}
.figcaption .figtxt{letter-spacing:.03em;text-transform:none;font-family:var(--sans);font-size:11px;color:var(--ink-soft)}
.archive{position:absolute;right:10px;top:6px;font-family:var(--mono);font-size:8.5px;letter-spacing:.14em;color:var(--muted);text-transform:uppercase}

/* ---------- panel ---------- */
.panel{width:100%;max-width:430px;justify-self:end;min-width:0;padding-top:clamp(10px,8vh,86px)}
.phead{display:flex;align-items:baseline;justify-content:space-between;border-bottom:1px solid var(--ink);padding-bottom:11px}
.phead h2{margin:0;font-family:var(--serif);font-size:22px;font-weight:600;letter-spacing:.01em}
.lat{font-family:var(--mono);font-size:9px;letter-spacing:.26em;color:var(--muted)}

.field{position:relative;margin-top:clamp(22px,3.6vh,34px)}
.field input{
  width:100%;border:0;border-bottom:1px solid rgba(21,20,15,.24);background:transparent;
  padding:20px 34px 11px 0;font:inherit;font-size:16.5px;color:var(--ink);outline:none;border-radius:0;
  transition:border-color .25s;
}
.field input:-webkit-autofill{-webkit-text-fill-color:var(--ink);box-shadow:0 0 0 60px var(--paper) inset}
.field label{
  position:absolute;left:0;top:19px;pointer-events:none;color:var(--muted);
  font-size:13px;letter-spacing:.02em;transition:transform .28s cubic-bezier(.2,.8,.2,1),font-size .28s,color .28s,letter-spacing .28s;
  transform-origin:left top;
}
.field label span{font-family:var(--mono);font-size:8.5px;letter-spacing:.18em;opacity:.65}
.field input:focus + label,
.field input:not(:placeholder-shown) + label{
  transform:translateY(-30px) scale(.72);color:var(--ink-soft);letter-spacing:.08em;
}
.field input{caret-color:var(--accent)}
.focusline{position:absolute;left:0;right:0;bottom:0;height:1.5px;background:var(--ink);transform:scaleX(0);transform-origin:left;transition:transform .42s cubic-bezier(.16,1,.3,1)}
.field input:focus ~ .focusline{transform:scaleX(1)}
.eye{
  position:absolute;right:-6px;bottom:2px;width:44px;height:44px;display:grid;place-items:center;
  border:0;background:none;color:var(--muted);cursor:pointer;border-radius:50%;
  opacity:.75;transition:opacity .2s,color .2s;
}
.eye:hover{opacity:1;color:var(--ink)}
.eye.on{color:var(--accent);opacity:1}
.field.invalid input{border-color:var(--accent)}
.shake{animation:shake .42s cubic-bezier(.36,.07,.19,.97)}

.err{margin:14px 0 0;min-height:19px;font-size:12px;color:var(--accent-ink);letter-spacing:.01em;opacity:0;transform:translateY(-3px);transition:opacity .25s,transform .25s}
.err.on{opacity:1;transform:none}
.err.info{color:var(--ink-soft)}

.submit{
  position:relative;display:flex;align-items:center;justify-content:space-between;gap:16px;
  width:100%;margin-top:clamp(14px,2.4vh,22px);padding:17px 20px;border:0;border-radius:0;
  background:var(--ink);color:var(--paper);font:inherit;font-size:13.5px;letter-spacing:.08em;
  cursor:pointer;overflow:hidden;isolation:isolate;
}
.submit::before{
  content:"";position:absolute;inset:0;background:var(--accent);z-index:-1;
  transform:scaleX(0);transform-origin:left;transition:transform .5s cubic-bezier(.16,1,.3,1);
}
.submit:hover::before,.submit:focus-visible::before{transform:scaleX(1)}
.submit:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
.submit .arrow{font-family:var(--mono);font-size:16px;transition:transform .35s cubic-bezier(.16,1,.3,1)}
.submit:hover .arrow{transform:translateX(6px)}
.submit.loading{pointer-events:none}
.submit.loading .stxt{opacity:.25}
.submit.loading .arrow{opacity:0}
.spin{display:none;position:absolute;left:50%;top:50%;width:16px;height:16px;margin:-8px 0 0 -8px;border:1.5px solid rgba(243,239,231,.35);border-top-color:var(--paper);border-radius:50%;animation:spin .8s linear infinite}
.submit.loading .spin{display:block}

.help{margin:clamp(18px,3vh,26px) 0 0;font-size:12.5px;color:var(--muted)}
.help a{color:var(--ink);text-decoration:none;border-bottom:1px solid rgba(200,69,42,.5);padding-bottom:1px;transition:color .2s,border-color .2s}
.help a:hover{color:var(--accent);border-color:var(--accent)}

.facts{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:clamp(22px,3.8vh,38px) 0 0;padding-top:14px;border-top:1px solid var(--line)}
.facts dt{font-family:var(--mono);font-size:8.5px;letter-spacing:.14em;color:var(--muted);text-transform:uppercase}
.facts dd{margin:5px 0 0;font-size:17px;font-variant-numeric:tabular-nums;letter-spacing:.01em}
.session{display:flex;align-items:center;gap:7px;margin:14px 0 0;font-family:var(--mono);font-size:9px;letter-spacing:.14em;color:var(--muted);text-transform:uppercase}
.sdot{width:5px;height:5px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 3px rgba(200,69,42,.12)}
.fine{margin:10px 0 0;font-size:10.5px;line-height:1.7;color:#6E6A60;letter-spacing:.01em}

/* ---------- footer ---------- */
.foot{display:flex;justify-content:space-between;gap:18px;padding:12px 0 14px;border-top:1px solid var(--line);font-family:var(--mono);font-size:9px;letter-spacing:.12em;color:#6E6A60;text-transform:uppercase}
.footright{text-transform:none;letter-spacing:.04em;font-family:var(--sans);font-size:10.5px}

/* ---------- entrance ---------- */
@keyframes rise{to{transform:translateY(0)}}
@keyframes fadeUp{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:none}}
@keyframes float{from{transform:translateY(0)}to{transform:translateY(-12px)}}
@keyframes spin{to{transform:rotate(360deg)}}
@keyframes shake{10%,90%{transform:translateX(-1px)}20%,80%{transform:translateX(2px)}30%,50%,70%{transform:translateX(-3px)}40%,60%{transform:translateX(3px)}}

/* ---------- responsive ---------- */
@media (max-width:1080px){
  .grid{grid-template-columns:minmax(0,1fr) minmax(320px,.8fr);gap:36px}
  .display{font-size:clamp(38px,6vw,72px)}
  .specimen{width:min(440px,92%)}
}
@media (max-width:900px){
  .frame{padding:16px 20px 0}
  .grid{grid-template-columns:1fr;gap:26px;padding:24px 0 22px;align-items:start}
  .specimen{display:none}
  .intro{max-width:none}
  .display{font-size:clamp(38px,10.6vw,62px)}
  .lede{max-width:none;font-size:14px}
  .specimen{width:min(420px,74%);margin-top:26px}
  .panel{max-width:none;justify-self:stretch}
  .phead{margin-top:4px}
  .field input{font-size:16px} /* avoid iOS zoom */
  .topmeta span:first-child{display:none}
  .topmeta i{display:none}
  .facts{margin-top:26px}
  .foot{flex-direction:column;gap:6px}
}
@media (max-width:560px){
  .frame{padding:14px 16px 0}
  .grid{padding:18px 0 18px}
  .word{font-size:14px}
  .display{font-size:clamp(34px,11.4vw,48px)}
  .line{padding-bottom:.06em}
  .specimen{width:min(360px,88%)}
  .eyebrow{font-size:9px;letter-spacing:.16em}
  .rule{width:28px}
  .figcaption{flex-direction:column;gap:4px}
  .facts dd{font-size:15px}
  .facts dt{font-size:8px}
}
@media (max-height:860px) and (min-width:901px){
  .grid{padding:14px 0 8px}
  .display{font-size:clamp(36px,4.4vw,68px)}
  .lede{margin-top:14px;font-size:13.5px;line-height:1.8}
  .specimen{width:min(400px,64%);padding-top:8px}
  .panel{padding-top:clamp(6px,4vh,40px)}
  .facts{margin-top:20px}
  .session{margin-top:10px}
  .foot{padding:10px 0 12px}
}
@media (max-height:720px) and (min-width:901px){
  .grid{padding:18px 0 20px}
  .specimen{width:min(380px,62%);margin-top:22px}
  .lede{margin-top:14px}
  .facts{margin-top:20px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms!important;animation-delay:0ms!important;transition-duration:.001ms!important}
  .line>span{transform:none}
  .eyebrow,.lede,.specimen{opacity:1}
  .figwrap img{animation:none}
}

/* page transition */
body{opacity:1;transition:opacity .26s ease}
body.leaving{opacity:0}

.specimen:hover .figwrap img{transform:scale(1.012)}
.specimen:hover .figcaption .fig{color:var(--accent-soft)}
@media (max-width:900px){
  .panel{padding-top:0}
  .specimen{margin-top:22px}
}
body::before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background:radial-gradient(52vw 52vw at var(--mx,50%) var(--my,30%), rgba(255,247,233,.55), transparent 62%);
  mix-blend-mode:soft-light;opacity:.9;
}

a:focus-visible,button:focus-visible,.submit:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
.eye:focus-visible{outline-offset:0;border-radius:50%}
.figwrap picture{display:block}
.figwrap .final{position:relative;z-index:1}
.figwrap .build{position:absolute;inset:14px 12px;z-index:2;pointer-events:none;animation:buildAway 3.2s cubic-bezier(.4,0,.2,1) 1.1s forwards}
@keyframes buildAway{60%{opacity:1}to{opacity:0}}
@media (prefers-reduced-motion:reduce){.figwrap .build{display:none}}